FUJITSU SOFTUNE F2 MC-16 User Manual

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CHAPTER 2 DEPENDENCE FUNCTIONS

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Abnormal Breakpoint

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Setting a breakpoint at the instruction immediately after string instructions listed below, may cause a
break in the middle of the string instruction without executing the instruction to the end.

MC-16/16L/16LX/16H: • MOVS

• MOVSW

• SECQ

• SECQW

• WBTS

• MOVSI

• MOVSWI

• SECQI

• SECQWI

• WBTC

• MOVSD

• MOVSWD

• SECQD

• SECQWD

• FILS

• FILSI

• FILSW

• FILSWI

MC-16F: Above plus • MOVM • MOVMW

Here are some additional points about the effects on other commands.

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Dangerous Breakpoints

•

Never set a breakpoint at an address other than the instruction starting address. If a breakpoint is the last 1
byte of an instruction longer than 2 bytes length, and if such an address is even, the following abnormal
operation will result:

- If instruction executed by STEP command, instruction execution not aborted.

- If breakpoint specified with GO command, set at instruction immediately after such instruction, the

breakpoint does not break.

Note:

When the debugging area is set again, all breakpoints in the area are cleared.